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  "road_source": "OpenStreetMap (local PBF extract)",
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  "elevation_provider": "USGS 3DEP (The National Map)",
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  "elevation_dataset": "USGS 3DEP 1 m DEM, NH_CT_RiverNorthL6_2015 (collected 2015)",
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  "notes": "Coarse pass: max 8.2% over 200 m (Terrain 50), gain 20.9 m over 281 m way. EXTENDED by graph walk: +4 segment(s) at base, +1 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. DEDUPE: absorbed 1 overlapping proposal(s): vernon-drive ADOPTED (NE wave 1, 2026-08-25): clean-steep. Wales dials per PRODUCTION 'US ADOPTION DIALS'.",
  "canopy_check": "unavailable \u2014 no surface model (DSM or point cloud) registered for this coverage",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
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  "county": "New Hampshire"
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}